1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db8c9a76770f8280478f571ae6d8e8dbc010f8009ff2de31f22e5c1cba553cb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/353d7aee-f63b-4e41-b9f1-e2e2ed5f4d5a.json and https://artists.proofprofile.net/proofs/artist/353d7aee-f63b-4e41-b9f1-e2e2ed5f4d5a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0348b243c429c6bcbd88a7bf22490717ef68efae83cb9ad2c2203fc49499a6e1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL1933561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1032f00496cc6729a182483f22b43b2ae2dda9acf387301eadbc9bc7d0c116e8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL1940990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04ac60c834fdfeb8f2c0f3a22f724a71aa98a375ea7c9240a6a42904585e4ee. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL1940992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3b2ccc0b95e7d07f163f5ba28fa90e221b4736bcdc58f80e3407e033064a48. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL1940993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bae9ad44e80e234245d8dab16c0d27e2ff79f48c0b1a5c684a9dcff8d0ebc39. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKPL1940997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333bd8815d6aece325e010b81056b754c3856d32a3a272f2fc95bb7d85e3e168. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1343709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e20fa5d5f7731d5bd098383db6624434ed73895fc8ed434972da0573f03612. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1344117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8c45b2f44f76343873b47bc5c623e81eacd872ff54bd83a4addf4e563b8135. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1344120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cbe58df594c27550a0a73b399c9fd245371d4012a4a66ed707992829ad8bd0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1418235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0eb8eea84f9cdf62e46be6075fb2eb66eed82f98474ed81ecb137bcf45ace6. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5c47ff0678806934905a46dd34130fce7cbe094ba0d8707b981c365dc4096e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406b44d7c70c4fecf747b3203c1299ebfd445043c26ab8274916c2504246d4d8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584989c9ef32d0f351edbb0eba65b0283b6a78c57b8dee31e8d90e3034761ead. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125c83a425ef25e82cdbf9fe08b1e3b60475d4f80350c7b2cdf210880a2586e6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a752fe93b4ba185279b006a28cf5c65c7c204496837d2d910d71a354fb43d8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f3971e33c344d62d50e25e3d9e828ec2f03c25c91b3ba7f8592e289d1579fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde0d592cd30e84be36cd9aff6298738bbe0d0ae634e0175b6f322c958e2548b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07058018a5f5c9ed76f5a9417b3c356222d377689b290b92ba18a15de5b88fe5. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc266a7cf31e890beb9c2c49b81f5071d4845d44cea458995d5a8e3f8362bd578. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFT2444453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb235867ed1106674539b5501efe30cca1057be8c920f8c0350a33c8a2ae67e13. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1266503.